Target Distance Tool: AutoFocus Calibration
You can use the Target Distance Tool to suggest a suitable target distance for AFMA / Focus Fine Tune lens calibration with Reikan FoCal.
Choose camera, lens focal length and target size:
|Lens Focal Length|
The document What’s the correct distance to run tests at? contains further useful information and explains why target distance is important and why the distance used does not need to be precisely measured in most cases.